Attachment for sound-reproducing instruments.



s. DAYAN.

v ATTACHMENT FOR SOUND REPRODUCING INSTRUMENTS.

APPLICATION FILED MAR. 21, 1913.

1,095; Patented May 1914.

/hrexr/ar i /gran Days/7 flfibzwal SYLVAIN DAYAN, 0F MbNTREAL, QUEBEC, CANADA.-

ATTACHMENT FOR SOUND-REPRODUCING INSTRUMENTS.-

oosnes. I

Specification of Letters Patent.

Application filed March 21,1913. Serial No. 755,952.

T 0 all whom it may concern r Beit known that I, SYLVAIN DAYAN, a subject of the King of Great Britain, residing at the city of Montreal in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Attachments for Sound-Reproducing Instruments, of which the following is a full, clear, and exact description.

This invention relates .to attachments for sound reproducing machines. and more-pan ticularly for gramophones of a type similar to the Victor. j The object of the invention is to provide a jointed tube adapted to be inserted between 'the sound box and goose neck, so that the sound box may be suitably adjusted to use either steel or sapphire needles.

A further object is to provide a device of this character which will not require to be removed each time a change is made from steel to sapphire needles.

There are several important recogiuied principles in connection with sound repro' duction which must be thoroughly understood before the full importance of the present invention becomes apparent. First it must be understood that the disposing of the diaphragm or sound-box. whatever the character of the needles used is dependent upon the nature of the record.- groove, whether vertically undulatory or laterally undulatory, that when using either steel or sapphire needles, the best results are obtained when the needles are arranged at an angle of approximately to the record groove, that the arc of movement of the needle should pass through the'axis of rotation of the record. In other Words, a line drawn through the axis of rotation of the tone arm and the needle pointv should be at all times substantially tangent to the grooves of the sound record. The drag of the moving record on a properly placed needle has absolutely no tendency to move it either toward or away from the record center and therefore the needle presses equally against each side of the record-groove. If, however. the needle is placed on'the opposite side of the record-axis from the tone arm axis, the needle will drag against the inner walls of the record-grooves and be uncertain in action. The pressure of the needle, however, upon the groove-walls when the needle is located between the record and tone-arm axes is the same for the same distance from the axis, but in opposite direct-ion. i

This invention consists in providing a flexible tube madeof relatively revoluble sections connected by elbows adapted to be permanently inserted between the gooseneck and sound box, so.th at the sound box may be arranged in any posit ion'and the needle adjusted to any angle for playing avith either steel or sapphire needles, and-- may be adjusted either inside or outside of the, record center, so that the needl'e will press against one side orthe other of the record'groove s to overcome centrifugal force and to correct anyjskipping tendencyl f r In the drawings which illustrate' the'invent-ion :-Figure 1- is a side elevation of the device in operative position showing in full lines the adjustment for using a sapphire.

needle, and in-dotted lines the-adjustment for using a steel needle. Fig. 2 is a plan view corresponding to Fig. 1. Figs. 3 and 4 PatentedMay 5, 1914; i

are front elevatid-ns ofslightly modified forms of the device.

Referring more particularly to the drawings, 5 designates thetone arm 'of a gramophone, 6 the goose neck connected thereto by the swivel joint 7, and 8 the'sound box usually carried at thefree end of the. goose neck and provided with a needle 9. The record table is designated'lO; and a record 11' is illustrated in position thereon and is held by the usual center-pin 12.

The device forming the subject matter of-this invention consists of a flexible tube connecting the goose neck and sound box, this tube being made up of four sections 13,14, 15 and 16 connected by elbows 17 18, and 19 and having an elbow 20 for the attachment of the sound box. Thestraight section 13 is arranged to be secured to the free end of the goose neck as shown, while the remaining 'straightsections 14:, 15 and16 are made any suitable length according to the size of the sound box. Each of the elbows 17. 18, 19 and 20 turns throughan angle of substantially The straight sections 14:, 15 and '16 are in reality only swivel joints connecting the elbows so that the tube may be adjusted to a great variety of shapes, and .the sound box adjusted to anv an 1c in three planes.

In F gs, 3 mm, slightly modified alternative forms are shown in which the parts 13 and 17 are replaced by other forms. In Fig. 3, a U-shaped tube is built up. of a return bend 21 connected to two oppositely opening elbows 22 by swivel joints 23. In Fig. 4, a reversely c'urved tube is provided consisting of the oppositely directed elbows 24 connected by a swivel joint 25. s

For playing records, with sapphireneedles, the sound box is arranged as shown in the drawings, preferably with the point of the needle slightly behind the record vcenter, as shown in Fig. 2. The reason for thisposition is that most records made for sapphire needles start at the center and play outwardly. This position of the needle causes it to press outwardly against the groove walls, so that there is no tendency to cause the needle to skip from one groove to the next beyond. The preferred adjustment of the tubular connection is as shown with the part 13 horizontal, elbow 17 turned upwardly andrearwardly, swivel part 14 extending upwardly and rearwardly', elbow l8 extending. downwardly and slightly away train the goose neck, sw vel part continuing in the same direction, elbow 19 extending downwardly, forwardly and very slightly away-from the goose neck, part 16 continuing in this latter direction, and elbow iextending forwardly, upwardly and slightly awayfrom the goose neck so as to hold the sound box at its proper inclination. Tojchange; from sapphire needle to steel needle, the'tube is grasped with one hand at the part 13 and'with the other about at the elbow 19, and the elbow l8 turned rela- .tively' to the elbow 17, so as to move the sound box through an angle of 'appromrnately 90. The sound box is then turned relatively to the elbow 20to bring the needle into proper angular relation with the record, and the change is complete. In this way .it may bemade almost instantly without detaching or adding any parts for playing the different styles of records The forms shown in Figs, 3 and 4: permit of the same adjustment, the only difference being a slightly greater radius of adjustment owing to the greater lengthof tube and additional number ofjoints.

From the foregoing description, it will be readily understood that the sound box may be adjusted to any position required to conform to any of the principles or laws 1' laid down. In addition to this, the device may be used on different sizes of machines in which the tone arms are at varying distances above the record by making an adj ustment between the part 13 and goose neck (3, which will have the effect of inclining the goose neck and raising or lowering the entire device.

While only three forms of the invention have been shown, it is obvious that a number of alterations in the precise arrangement may be made without departing from the spirit of the invention. Therefore it must be understood that nothing contained in this but merely as illustrative,

Having thus described my invention, What I claim is An attachment for gramophones having a specification shall be regarded-as limitative,

' goose neck and a sound box including a flexible tube intermediate the goose neck and the sound box, said tube comprising a straight horizontally arranged portion con necting thegramophone goose neck with'an elbow, an upwardly andrearwardly extend STUART R. W. ALLEN. G. M. MonnLAND. 

